Speaker
Thomas Lucas
(Paul Scherrer Institute)
Description
Surface oxidation has been observed during the operation of the 150 MHz flat-top cavity of HIPA. Initially suspected to arise from multipacting, this has now been confirmed through detailed Particle-in-Cell simulations. The studies reveal that the oxidation originates from single-point multipacting, where electrons become trapped in a local minimum of the electric field magnitude. Guided by these insights, the cavity geometry has been re-optimised to remove the field minimum and effectively suppress multipacting.
Author
Thomas Lucas
(Paul Scherrer Institute)
Co-authors
Dr
Jean-Yves Raguin
(Paul Scherrer Institute)
Marco Pedrozzi
(Paul Scherrer Institute)
Paolo Craievich
(Paul Scherrer Institute)